This book is designed for the instruction of students. It opens with a chapter on "How and what to observe," which is followed by one on "The Instrumental Outfit," in which are described, with cuts, the prismatic compass, chronometer, barometer, odometer, pedometer, clinometer, sextant, hand-level, heliotrope, reflector, and range-finder, the name of some maker being given with each. The next three chapters are on "Scales of Maps," "Forms of Record," and "Graphical Representations," and are supplied with diagrams and tables for illustration and reference. Under "Instruments and Methods used in 'Filling in,'" directions are given for making stadia measurements, for the use of the plane-table, and of the transit. Directions for determining the true meridian follow, with descriptions of two forms of solar transit. Short chapters are devoted to "Hydrography" and "Underground Topography,"; "Field Sketching," "Computations," and "Modeling" are taken up successively, and the final chapter is devoted to "Applications," in which are considered the locating of common roads, railroads, canals, and pipe-lines; irrigation, aqueducts, and the locating of cities. Among the accompanying maps may be mentioned one of the Yellowstone National Park, one of the floor of the Mammoth coal-bed in the vicinity of Summit Hill, Carbon county, Pennsylvania, and charts of Hampton Roads, and Boston Bay.